Adele - 'Rolling In The Deep'

15. Adele - 'Rolling In The Deep'

Adele's ultimate break-up song 'Rolling In The Deep' has gone on to be a massive hit around the world, and sees the singer finally telling her boyfriend that their relationship is over. Adele has previously said she wrote it as a diss to the man in question and the song's lyrics show her standing up to him and declaring "we could have had it all".